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Finding the Fourth Proportional to 69,219.40, 103,829.10 and 67,907.20

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Solution

The fourth proportional to 69,219.40, 103,829.10 and 67,907.20 is: 101,860.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,219.40 : 103,829.10 = 67,907.20 : x
  2. Step 2: Convert to fraction form
    69,219.40/103,829.10 = 67,907.20/x
  3. Step 3: Cross multiply
    69,219.40x = 103,829.10 × 67,907.20
  4. Step 4: Simplify right side
    69,219.40x = 7,050,743,459.52
  5. Step 5: Solve for x
    x = 7,050,743,459.52/69,219.40
  6. Step 6: Final answer
    x = 101,860.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.